Special Weather Statement, NWS Northern Indiana

Area Forecast Discussion
National Weather Service Northern Indiana
241 PM EDT Thu May 31 2018

.SYNOPSIS...
Issued at 152 PM EDT Thu May 31 2018

Scattered showers and thunderstorms will continue through the
evening hours, with additional chances later tonight into Friday.
Otherwise, expect partly to mostly cloudy skies. Low temperatures
will be around 70 degrees. Friday will be cooler, with highs only
reaching into the upper 70s and low 80s. Dangerous swimming
conditions are expected at Lake Michigan beaches Friday afternoon.
Beachgoers should stay out of the water.

&&

.SHORT TERM...(This Evening through Friday)
Issued at 236 PM EDT Thu May 31 2018

Ongoing convective complex moving across the Ohio valley expected
to continue on mainly eastward track given zonal flow in mean
cloud bearing layer while visible sat imagery depicting remnant
MCV over northern MO. Ample low level and boundary layer moisture
combined with increasing diurnal instability will have widely
scattered convection possible into the evening hours. Weak flow
and a weakly forced environment does not favor any organized
convection over much of the area...exception being southern CWA
where greater instability and a little enhanced helicity has
broken line of strong/severe storms. Precip chances continue
overnight as cold front approaches the area bringing enhanced mass
flux convergence along with an increasing low level shear with
additional enhanced shear contribution from MCV that HIRES
guidance has moving into central Indiana tonight. Precip chances
also linger into Friday as secondary short wave rotates through
around the backside of main upper trof. One more warm and muggy
night for all but the far NW CWA followed by cooler and drier
airmass moving in behind the front on Friday.

&&

.LONG TERM...(Friday Night through Thursday)
Issued at 236 PM EDT Thu May 31 2018

Water vapor imagery that is depicting upper trof coming onshore
in the Pacific NW Thursday morning will have re-enforcing jet
dynamics behind it as it pushes eastward and extends from
Saskatchewan down into the northern plains by Saturday morning.
Downstream amplification will have ridging over the region for a
pleasant start to the weekend. Surface ridging extending down from
Canadian high pressure will have cooler and less humid airmass in
place providing for much more seasonable temperatures with a
morning low 55-60F and afternoon high 75-80F. Upstream trof will
continue eastward and and bring a surface frontal wave through the
area Saturday night/Sunday morning and bring a chance for
showers/storms. Models trending toward upper trof digging and
closing off over the great lakes region Sunday with plenty of
spread in timing and placement. Modest mid-level cold pool (-15C)
over the region could aid in some diurnal showers over the area
Sunday afternoon but forcing generally shifting east of the area.
Remainder of extended looking fairly quiet as weak surface ridging
builds into the region. NW flow aloft will keep temperatures
quite seasonable for this time of year.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday Afternoon)
Issued at 152 PM EDT Thu May 31 2018

VFR conditions are expected to prevail through the TAF period, with
only brief reductions to MVFR possible during any heavier showers
and thunderstorms this afternoon and evening. As of 1745Z, showers
and even a few thunderstorms were observed on radar, west and south
of the terminals. Otherwise, expect a wind shift by Friday morning
to the west-northwest as a cold front moves through.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...Beach Hazards Statement from Friday afternoon through late
     Friday night for INZ003.

MI...Beach Hazards Statement from Friday afternoon through late
     Friday night for MIZ077.

OH...NONE.
LM...Small Craft Advisory from 1 PM Friday to 5 AM EDT Saturday for
     LMZ043-046.

&&

SYNOPSIS...MCD
SHORT TERM...JAL
LONG TERM...JAL
AVIATION...MCD

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Hazardous Weather Outlook
National Weather Service Northern Indiana
416 AM EDT Thu May 31 2018

INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005-
015-016-024-025-010830-
La Porte-St. Joseph IN-Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-
Pulaski-Marshall-Fulton IN-Kosciusko-Whitley-Allen IN-White-Cass IN-
Miami-Wabash-Huntington-Wells-Adams-Grant-Blackford-Jay-Berrien-
Cass MI-St. Joseph MI-Branch-Hillsdale-Williams-Fulton OH-Defiance-
Henry-Paulding-Putnam-Van Wert-Allen OH-
416 AM EDT Thu May 31 2018 /316 AM CDT Thu May 31 2018/

This hazardous weather outlook is for portions of southwest
Michigan...northern Indiana and northwest Ohio.

.DAY ONE...Today and Tonight

Thunderstorms are possible across the area this afternoon into
tonight. Isolated severe thunderstorms may be possible, especially
south of Route 24. Damaging winds as well as heavy rain will pose the
main threats.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

There is a small chance for thunderstorms Saturday night into Sunday

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon into tonight.

&&

Stay tuned to NOAA Weather Radio for further details or updates...or
check our web site at weather.gov/iwx

LMZ043-046-010830-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
416 AM EDT Thu May 31 2018

This hazardous weather outlook is for portions of The Nearshore
Waters of Southeastern Lake Michigan.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Conditions will become hazardous for small craft Friday afternoon
into Friday night with the potential for dangerous swimming
conditions as well.

&&

Stay tuned to NOAA Weather Radio for further details or updates...or
check our web site at weather.gov/iwx

Special Weather Statement
National Weather Service Northern Indiana
337 PM EDT THU MAY 31 2018

INZ026-027-033-034-312015-
Jay-Blackford-Adams-Wells-
337 PM EDT THU MAY 31 2018

...A STRONG THUNDERSTORM WILL AFFECT BLACKFORD...SOUTHEASTERN
WELLS...SOUTHWESTERN ADAMS AND CENTRAL JAY COUNTIES...

At 337 PM EDT, a strong thunderstorm was located near Hartford City,
moving east at 30 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Portland, Hartford City, Berne, Dunkirk, Montpelier, Geneva,
Pennville, Center, Nottingham, Bryant, Mill Grove, Como, Keystone,
Collett, Domestic, Balbec, Ceylon, Dillman, Petroleum and College
Corner.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4037 8522 4038 8522 4038 8539 4058 8541
      4069 8495 4035 8490
TIME...MOT...LOC 1937Z 262DEG 27KT 4050 8531

CM

Special Weather Statement
National Weather Service Northern Indiana
413 PM EDT THU MAY 31 2018

INZ034-312045-
Jay-
413 PM EDT THU MAY 31 2018

...A STRONG THUNDERSTORM WILL AFFECT JAY COUNTY...

At 413 PM EDT, a strong thunderstorm was located over Portland,
moving east at 25 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Portland, Redkey, Westchester, Center, Bryant, Salamonia, Trinity,
Brice, Como, Bellfountain, College Corner, Boundary City, Liber,
Blaine, Collett, New Corydon, Bluff Point, Powers and New Mount
Pleasant.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4055 8510 4057 8491 4057 8480 4031 8481
      4031 8519
TIME...MOT...LOC 2013Z 269DEG 23KT 4047 8500

CM

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